44results about How to "Guaranteed toughness" patented technology

The invention discloses a preparation method of a flame-retardant anti-aging polyolefin plastic, and belongs to the technical field of polyolefin material processing.The preparation method comprises the steps that a modified anti-aging agent is mixed with a DOPO-based flame retardant modified by introducing isocyanate and epoxy groups, the mixture is added into a polyolefin material, during combustion, carbon formation is promoted by the phosphorus element, and the flame-retardant anti-aging polyolefin plastic is obtained. The flame retardant and nitrogen element synergistically play a flame-retardant role, meanwhile, epoxy groups in the flame retardant and carboxyl of polypropylene are subjected to a ring-opening reaction, the crosslinking degree of the material is enhanced, the modified anti-aging agent can effectively capture free radicals and inhibit oxidative degradation, and the mechanical strength and flame-retardant effect of the material are improved. According to the modification method, the anti-aging, high-temperature-resistant and flame-retardant properties of the polyolefin plastic are remarkably improved, the stability of the polyolefin plastic in high-temperature and severe environments is enhanced, the service life is prolonged, and the mechanical property and the thermal stability of the polyolefin plastic are improved.

The invention discloses a primary and secondary synergistic flexible stop valve with a self-recovery valve rod, relates to the technical field of valves, and aims to solve the problems of how to find a breakage fault of the valve rod in time and how to recover the function of the valve rod automatically. The stop valve comprises a main valve and a secondary valve, wherein the main valve mainly comprises a main valve body, a main valve cover, a main valve rod, a main valve core, a valve rod fracture self-sensing mechanism and a redundant valve rod mechanism; through the arranged valve rod breakage self-sensing mechanism, automatic identification can be achieved when the main valve rod is broken and the main valve element falls to the valve seat; through the arranged redundant valve rod mechanism, after the valve rod fracture self-sensing mechanism recognizes that the main valve rod is fractured, the redundant valve rod can be controlled to replace the main valve rod to be connected with the main valve element, self-recovery of the function of the valve rod is achieved, and the toughness of the structural layer of the stop valve is guaranteed; the secondary valve can replace the main valve to carry out overflowing control after the main valve rod is broken and before self-repairing, so that the stop valve keeps the original function without losing, and the toughness of the functional level of the stop valve is ensured.

The invention discloses a low-temperature cured bi-component epoxy resin conductive adhesive. A component A and a component B are mixed according to a ratio of 1: 1 and then cured at room temperature; the component A at least comprises the following components: novolac epoxy resin, epoxy resin, core-shell toughened epoxy resin, a diluent, a coupling agent, a thixotropic agent and a conductive filler; the component B at least comprises the following components in parts by mass: a curing agent and an accelerant; wherein the core-shell toughened epoxy resin is bisphenol A epoxy resin with uniform nanoscale core-shell particle dispersity; the invention also discloses a preparation method of the low-temperature cured bi-component epoxy resin conductive adhesive. The curing of the conductive adhesive at low temperature or room temperature is realized, the internal reaction degree of the matrix is high, the mechanical strength and conductivity of the conductive adhesive are met at the same time, and effective bonding is realized and relatively good performance is kept after electronic components are cured in application scenes with use temperature requirements.

The invention discloses an iron-based / alpha-Fe amorphous nanocrystalline soft magnetic alloy, which is based on an iron-based amorphous strip mainly comprising Fe element, and contains Co element with atomic fraction of 6%-8%, Cu element with atomic fraction of 0.7%-1%, and the balance of trace elements which are at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like. And carrying out stress relief annealing on the strip with the assistance of a magnetic field, and then carrying out crystallization treatment. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the alloy only induces precipitation of a very small number of nanocrystals, and high saturation flux density and low coercive force can be obtained while the toughness of the strip is ensured.

The application discloses a kind of production and cultivation methods of crisp chicken, comprising the following steps: S1, cultivate crisp chicken species: with E'mei black chicken as basic population, hybridization breeding is obtained with sasso chicken, and hybridization is obtained with Rongde small black chicken, and the crisp chicken species with chicken skin thickness not less than 2.3mm is selected and bred;S2, nutrition regulation feeding is carried out: the nutrition regulation feeding of at least 50 days is carried out to the crisp chicken species in fattening period, and the feed with the crude protein content of 18%-22% is provided, and the feed includes soybean meal, vitamin C, fat, fat metabolism aid, fermented soybean meal and trace nutrients;S3, breeding environment management is carried out: in fattening period, control chicken house environment temperature is 18-25 DEG C, relative humidity is 50%-60%, and breeding density is controlled.The application is cultivated by three system matching breeding, accurate nutrition regulation and fine breeding management multi-link cooperation, and the chicken species that fits crisp core characteristic is cultivated.

The invention discloses a ceramic cast steel composite reamer tooth and relates to the technical field of alloy cast steel matrix and random ceramic compositing, the reamer tooth is manufactured through a ceramic particle shaping process and a molten metal pouring process, and the ceramic particle shaping process comprises the steps of metallization pretreatment of ceramic particles, mixing of the ceramic particles, a binder and metal powder and the like; the molten metal pouring process comprises the steps of molten metal gravity pouring, high-temperature quenching and tempering heat treatment and the like. Compared with the prior art, the composite reamer tooth is formed by staggering the alloy cast steel base body and the random ceramic composite body, under the same working condition, the abrasion resistance of the reamer tooth for the dredger can be improved, the service life of the reamer tooth is prolonged by more than two times, the operation cost is reduced, and the working efficiency is improved.

A CVT steel belt system belongs to the technical field of CVT transmissions and comprises a plurality of first chain pieces and a plurality of second chain pieces distributed among the first chain pieces at equal intervals, the two sides of the first chain pieces and the two sides of the second chain pieces are provided with highly-asymmetric saddles respectively, and the two sides of the first chain pieces and the two sides of the second chain pieces are connected in series through first steel ring modules and second steel ring modules respectively. Limiting structures used for restraining the first steel ring module or the second steel ring module are arranged on the two sides of the second chain piece, the first steel ring module and the second steel ring module are matched with the corresponding saddles and each comprise a plurality of steel rings which are stacked up and down, and the steel rings which are stacked up and down form a strength and toughness gradual change structure. Two pushing piece structures with asymmetric saddle heights are designed, lateral limiting of the steel ring module can be achieved, steel rings of different layers can be reasonably arranged, the design redundancy is reduced, meanwhile, the strength and toughness of the steel rings are reasonably optimized, and by means of the steel ring combination mode with the strength gradually changed from bottom to top, the stability of the steel ring module is improved. And the use performance of the steel belt system is improved.

The present invention provides a polyurethane rigid foam material and a preparation method thereof, belonging to the technical field of polyurethane rigid foam. The preparation method comprises: dehydrating a polyether substance; preparing a combined polyether mixture; preparing a polymerized MDI mixture; and mixing the combined polyether mixture with the polymerized MDI mixture to obtain the polyurethane rigid foam material. The present invention dehydrates the polyether substance to eliminate the influence of heat and carbon dioxide generated by the addition of water, and adds a combination of multiple low-boiling point foaming agents, thereby maintaining the toughness of the foam and greatly reducing the thermal conductivity of the material.

The invention provides a glass fiber reinforced plastic oil pipe connecting structure and a preparation method thereof.The method comprises the steps that 40-60 parts by mass of bisphenol A epoxy resin, 3-8 parts by mass of polyfunctionality epoxy, 2-5 parts by mass of epoxy diluent, 0.1-0.5 part by mass of coupling agent, 20-40 parts by mass of curing agent and 0.1-0.5 part by mass of accelerant are mixed, stirred and left to stand, and thermosetting resin mixed liquid is obtained; the fiber soaked with the thermosetting resin mixed liquid glue solution is wound on a core mold to be cured and formed to obtain the glass fiber reinforced plastic oil pipe connecting structure, the fiber is carbon fiber or aramid fiber with the modulus higher than that of glass fiber, and the core mold is set according to the size of the glass fiber reinforced plastic oil pipe connecting structure. The connecting structure is matched with the application of high well depth, high-temperature-resistant epoxy resin is used in a composite material, two resins with different epoxy equivalents ensure the toughness of the epoxy resin (the toughness is increased by high epoxy equivalents), the viscosity of the resin is reduced by the diluent, but no solvent exists. The final resin formula has good processability and good toughness, can be cured at medium and high temperatures, and has a long-term use temperature of 120 DEG C or above.

The invention discloses a novel environment-friendly temperature-resistant fireproof coating and a preparation method thereof.The fireproof coating is prepared from, by weight, 10-13 parts of silicon carbide, 23-27 parts of silicate, 8-12 parts of kieselguhr, 6-8 parts of kaolinite, 10-12 parts of aluminum oxide, 6-9 parts of ceramic micro powder, 20-25 parts of sodium fluosilicate, 20-22 parts of acrylic emulsion and 15-18 parts of organic silicon resin. And 10-13 parts by weight of sodium zirconate and the like. The preparation method comprises the following steps: mixing silicon carbide, silicate, diatomite, kaolinite, aluminum oxide and ceramic micro powder to obtain mixed powder; mixing sodium fluosilicate, an acrylic emulsion, organic silicon resin, sodium zirconate, a diluent, a stabilizer, a suspending agent, an adhesive agent and a rust dissolving agent to obtain a mixed material liquid; during use, the mixed powder and the mixed material liquid are uniformly mixed. The technical problems that an existing fireproof coating is poor in high temperature resistance, short in continuous temperature resistance time and the like can be solved.

The invention belongs to the technical field of powder coatings, and particularly relates to a preparation method of TMA-free polyester resin, a product and application of the TMA-free polyester resin. Polyhydric alcohol serves as an initial raw material, is melted and then is subjected to esterification reaction with polybasic acid and an acidification end-capping reagent which are added in batches in the presence of an organic tin catalyst and an antioxidant; and carrying out vacuum polycondensation, curing, discharging, cooling, crushing and packaging to obtain the TMA-free polyester resin with excellent performance. The coating is not only suitable for indoor coatings, but also more suitable for outdoor occasions with high durability and high decoration requirements, such as automobile coating, building exterior walls and outdoor furniture, and can also be used for manufacturing base materials for molding after coating, such as traveling cases and tempered doors, so that the construction difficulty of molding before coating is effectively reduced, and the application range is greatly widened.

The application belongs to the technical field of engineering plastics, and particularly relates to the field of ultrasonic welding PET compositions, and discloses a PET resin composition which comprises the following components: 60-75 parts of PET resin, 5-15 parts of PETG resin, 2-5 parts of a toughening agent, 18-25 parts of glass fiber, and 0.2-0.8 parts of a nucleating agent. The application provides a PET composition with high ultrasonic welding strength, so that the integrity and overall strength of a PET product after ultrasonic welding are improved, and the cracking and separation of the welding position can be effectively avoided. The PET resin composition of the application is applied to a PET resin material product which needs to be ultrasonically welded, and the related product prepared by the PET resin composition has excellent ultrasonic welding strength and excellent mechanical properties.

The application belongs to the technical field of thermoplastic elastomer modification, and discloses a silane coupling agent modified thermoplastic elastomer and a preparation method thereof, and aims to solve the technical defects of the existing thermoplastic elastomer, such as uncoordinated strength and toughness, poor temperature change resistance, insufficient ultraviolet stability, and poor comprehensive performance coordination. The modified thermoplastic elastomer is prepared by compounding a thermoplastic elastomer base material, a silane coupling agent modification liquid, a boron nitride-kaolin combined agent and other auxiliary agents according to specific weight parts. The preparation process of the application is simple and controllable, the obtained modified thermoplastic elastomer has balanced strength and toughness, a wide temperature change resistance range, excellent ultraviolet stability and outstanding comprehensive performance.

The utility model discloses a connecting clamping piece for connecting a bottom plate and a button base and a knob switch, which belong to the technical field of knob switches, and comprise a metal plate, a bottom plate buckle and a base buckle, the bottom plate buckle and the base buckle are fixedly connected with the metal plate, and each of the bottom plate buckle and the base buckle comprises a connecting plate and a clamping plate fixedly connected with the connecting plate. The included angle between the clamping plate and the connecting plate is not greater than 90 degrees; the bottom plate buckle is located at the end, facing the bottom plate, of the metal plate, a first through hole is formed in the bottom plate, and the bottom plate buckle penetrates through the first through hole to be connected with the bottom plate in a clamped mode. The base buckles are located at the end, facing the button base, of the metal plate, at least one pair of oppositely-arranged base buckles are arranged on the metal plate, a clamping table is arranged on the side, back to the metal plate, of the button base, and the base buckles are connected with the clamping table in a clamped mode. Therefore, the button base can be replaced without dismounting the bottom plate of the button base, the operation steps are simplified, and the replacement efficiency is improved.

The invention provides a metal-based ceramic composite wear-resistant material and a preparation process thereof, and belongs to the technical field of metal-based ceramic materials. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of a ceramic particle through two-stage coating of the ceramic particle and low-temperature ultrasonic relaxation cooperative treatment, then mixing with metal matrix powder, molding and sintering, and finally, carrying out ultrasonic relaxation treatment at 15-25 DEG C. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of the ceramic particle; according to the process, low-temperature aging micro-crack initiation is effectively inhibited, the number of micro-cracks is only 1.8 / mm < 2 > after the material is aged for 1000 h at the temperature of-10 DEG C, the interface bonding strength reaches 256.7 MPa, the wear resistance attenuation rate is only 9.9%, and the material can be stably adapted to mining machinery scenes in alpine regions.

The application discloses additive manufacturing 5-series aluminum alloy powder material containing Ce and Yb elements and a preparation method thereof, and comprises the following steps: preparing a mixed material by weighing raw materials according to component proportions, and preparing Al-Mg-Sc-Yb-Ce-Mn-Si pre-alloy powder through vacuum melting and argon atomization, wherein the raw materials are as follows in terms of mass fraction: Mg: 4-12%, Sc: 0.6-0.8%, Zr: 0.1-0.8%, Mn: 0.2-0.5%, Si: 0.3-1.0%, Yb: 0.03-0.8%, Ce: 0.03-0.8%, and the rest is Al and other impurities. The application adds a certain amount of rare earth elements (Yb and Ce) and Mn and Si elements in the traditional AlMgScZr alloy powder, forms a second phase with alloy elements, plays a role in refining grains and improving crack resistance as a refining agent, controls the process, obtains powder with a certain particle size range through airflow screening, carries out additive manufacturing according to a certain process window, and through heat treatment, the strength of the additive manufacturing high-strength and high-toughness aluminum alloy is improved to 550 MPa level while maintaining high plasticity and toughness.

The utility model relates to the technical field of uvioresistant fabrics, and discloses an uvioresistant fabric which comprises a fabric, a protection mechanism is arranged on the inner wall of the fabric and used for protecting ultraviolet rays, a tensile mechanism is arranged on the inner wall of the protection mechanism and used for enhancing the tensile property of the fabric, and the fabric is arranged on the inner wall of the protection mechanism. The protection mechanism comprises an anti-ultraviolet coating, the outer wall of the anti-ultraviolet coating is fixed to the top of the inner wall of the cloth, the bottom of the anti-ultraviolet coating is fixedly connected with an anti-ultraviolet assembly, the bottom of the anti-ultraviolet assembly is fixedly connected with a filtering assembly, and the bottom of the filtering assembly is fixedly connected with a breathable assembly. The top of the outer wall of the ventilation assembly is fixedly connected with a water absorption assembly. According to the anti-ultraviolet fabric, the first anti-ultraviolet layer is fixed at the top of the inner wall of the fabric, and the water absorption of the fabric can be ensured by forming the plurality of water absorption holes in the outer wall of the fabric, so that the use requirements are met.

The utility model relates to the field of rasping machines, and discloses a novel rasping machine saw blade which comprises a saw blade seat installed on a rasping machine, a saw blade body is installed on the saw blade seat through a detachable structure, saw teeth are arranged at the bottom of the saw blade body, and the saw teeth are arranged to be variable in tooth pitch. A wear-resistant coating is arranged on the surface of the saw blade body, a plurality of heat dissipation grooves are formed in the saw blade body in the length direction, and the heat dissipation grooves are in a wave shape. A mounting hole is formed in the saw blade seat, a mounting rod is mounted on the inner wall of the rear side of the mounting hole, a mounting hole matched with the mounting rod is formed in the saw blade body, the tooth pitches of the saw teeth are sequentially increased from left to right, and the tooth pitches of the saw teeth are sequentially increased from 8 mm to 12 mm from left to right. The saw blade has the following advantages and effects that efficient and accurate saw cutting, good heat dissipation, wear resistance, durability and convenient disassembly and assembly are achieved through the variable-tooth-pitch sawteeth, the wavy heat dissipation grooves, the wear-resistant coating and the convenient detachable structure, and the machining quality and efficiency are improved.

The present application relates to the technical field of condom production, in particular to a natural latex rubber condom production method; S1: all used raw materials are inspected, and raw latex is prepared and its performance is tested, and the qualified product of raw latex is obtained after testing; S2: solution preparation; S3: preparation of vulcanized latex; S4: vulcanized latex ripening, storage and filtration; S5: sent to a condom linkage machine production line; after mold washing treatment is completed, latex dipping treatment is entered, after the latex dipping treatment is completed, demolding is performed to obtain a semi-finished product; after the condom demolding is completed, a finished product post-treatment process is entered; after the semi-finished product bubble isolation agent is completed, a final drying process is entered; after drying, a condom finished product is obtained. The process method can effectively ensure the uniformity of dipping and the forming effect in the production process of the condom, ensure the toughness and overall tensile strength of the obtained condom product, and improve the use performance of the product.

The application discloses a torsion bar shaft, a lightweight anti-rolling torsion bar and a metal pipe hole processing technology. The torsion bar shaft comprises a metal pipe and a fiber layer which is bonded to the outer periphery of the metal pipe. The lightweight anti-rolling torsion bar comprising the torsion bar shaft further comprises torsion arms at both ends of the torsion bar shaft and an end connecting body. The torsion arms are formed by extending and bending the metal pipe of the torsion bar shaft. The end connecting body comprises a swing arm connecting part and a pull rod connecting part. The swing arm connecting part is connected with the end of the torsion arm, and the pull rod connecting part is connected with the pull rod. The metal pipe hole processing technology comprises the following steps: S1, performing cylindrical processing on a rod to be processed; S2, clamping the rod by reversing the direction, and drilling a hole one and a hole two which are communicated from the A end and the B end of the rod respectively; and S3, positioning and clamping the rod with the axis line one and the axis line two as the pipe hole axis lines, and performing turning on the outer periphery of the rod to make the wall thickness uniform.

The application belongs to the technical field of paint, and particularly relates to high stone impact resistance and free grinding water-based intermediate coating for buses, and a preparation method and application thereof. The high stone impact resistance and free grinding water-based intermediate coating is combined by component A resin paint and component B curing agent according to a weight ratio of 5:1. The component A resin paint comprises the following components: hydroxyl acrylic resin, deionized water, dispersing agent, anti-settling agent, defoaming agent, leveling agent, wetting agent, titanium white powder, talcum powder, flatting powder, thickening agent and solvent A. The component B curing agent comprises the following components: curing agent and solvent B. Compared with the prior art, the application solves the problem that the intermediate coating of the automobile coating in the prior art still needs to be polished during the construction process, thereby leading to complex steps and dependence on the experience of workers. The intermediate coating of the scheme has excellent performance and realizes free polishing operation during the construction process.

The invention belongs to the technical field of polyurethane, and particularly relates to silicon-zirconium synergistically modified polyurethane used as a wall and floor coating and a preparation method of the silicon-zirconium synergistically modified polyurethane. The silicon-zirconium synergetic modified polyurethane used as the wall and floor coating is prepared by mixing zirconium-silicon-containing polyurethane and amino polysilane, molecular main chains of the zirconium-silicon-containing polyurethane and the amino polysilane contain zirconium and silicon which are combined in a covalent bond mode, the intrinsic thermal stability of the polyurethane is improved, and meanwhile the compatibility of the zirconium-silicon-containing polyurethane and the amino polysilane can be improved through a similar structure. In the curing process of the silicon-zirconium synergetic modified polyurethane used as the wall and floor coating, an interpenetrating polymer network can be formed through hydrogen bonds, amino groups and a curing agent, and the flexibility of the polymer network is improved by optimizing the dosage of the curing agent, so that the thermal stability of the silicon-zirconium synergetic modified polyurethane used as the wall and floor coating is improved, and the service life of the silicon-zirconium synergetic modified polyurethane used as the wall and floor coating is prolonged. The problem of embrittlement of the coating caused by overhigh crosslinking density is avoided, and the toughness of the coating is ensured.

The invention discloses an environment-friendly negative ion gypsum plaster board and a preparation method thereof, the negative ion gypsum plaster board comprises a core material and surface protection paper, and the core material is prepared from hemihydrate gypsum, fly ash, silica gel, negative ion powder, titanium dioxide, an improved foaming agent, a water reducing agent, a retarder, plant starch, activated rubber powder and water. The environment-friendly gypsum plaster board can effectively release anions and effectively adsorb formaldehyde in air, and the environment-friendly performance of the gypsum plaster board is improved.

The application relates to the technical field of fiber reinforced composites, in particular to a prepreg, a preparation method thereof and a fiber reinforced composite. The prepreg comprises a reinforcing material and a resin composition attached to the reinforcing material; the reinforcing material is carbon fiber; the resin composition comprises the following components in parts by weight: 100 parts of an epoxy resin, 0.1-10 parts of an epoxy-containing diluent, 1-12.5 parts of a tackifier, 4-10 parts of a curing agent, and 1-5 parts of an accelerator; the epoxy resin comprises one or more of bisphenol A type epoxy resin, multifunctional epoxy resin and phenolic epoxy resin, and the epoxy equivalent weight of the bisphenol A type epoxy resin and the phenolic epoxy resin is independently 155 g / eq-220 g / eq. The prepreg has good quality consistency, and can effectively improve the mechanical properties of the fiber reinforced composite.

The invention relates to the technical field of ferrous metallurgical equipment maintenance and welding repair, and discloses a steel billet hydraulic shear cobalt-based alloy blade repair method which comprises the steps that S1, pretreatment is conducted, low-pressure sand blasting cleaning is conducted, a failure layer is removed, and a carburized layer of 0.05-0.2 mm on the groove wall is polished and removed; s2, a Co-Cr-W-C cobalt-based welding wire with a certain proportion is selected and used; s3, surfacing welding is conducted, specifically, a cutting edge is preheated to 280-320 DEG C, the temperature of a tool apron is strictly controlled to be not higher than 180 DEG C, multi-layer and multi-pass surfacing welding is conducted through a TIG welding machine, and stress relief annealing is conducted at the temperature of 560-600 DEG C after surfacing welding; and S4, machining and grinding to recover the geometric dimension. According to the method, through carburized layer removal, gradient temperature control and a special heat treatment system, the problems that cracks and air holes are prone to being generated in cobalt-based alloy welding and a tool apron base body is softened and deformed due to overheating are effectively solved, the metallurgical bonding strength, high-temperature abrasion resistance and thermal fatigue resistance life of a repaired blade are improved, and the service cycle of equipment is prolonged to a large extent.

The invention belongs to the field of material science and engineering, and relates to a composite heat treatment process suitable for working in an environment of 300 DEG C. According to the composite heat treatment process, a workpiece is tempered at the use temperature of 380 DEG C after high-frequency quenching through a method combining sulfur carbonitriding and high-frequency quenching, the surface hardness of the outer circle phi 34 is 54-56 HRC, and the technical requirement for the use temperature of 300 DEG C is met. A method of combining sulfur-carbonitriding and high-frequency quenching is adopted, and a compound layer of sulfur, carbon and nitrogen is formed on the surface of a workpiece, so that the hardening layer depth of the workpiece is increased, the alternating load resistance of the workpiece is enhanced, the surface friction coefficient is reduced, the surface hardness is improved, the toughness of the center of the workpiece is kept, the risk of brittle fracture is reduced, and the wear resistance of the workpiece is improved; and the process repeatability is good, and stable product quality can be ensured.

The invention provides a control method and device for secondary chemical strengthening of cover plate glass and a program product. The method comprises the following steps: determining process parameters of secondary strengthening according to a sodium ion coupling diffusion equation; and performing primary chemical strengthening and secondary chemical strengthening on the cover plate glass according to the process parameters. According to the control method for secondary chemical strengthening of the cover plate glass provided by the invention, the problem that the surface potassium ion concentration after secondary strengthening cannot be accurately predicted and controlled at present is fundamentally solved by introducing a sodium-potassium ion coupling diffusion equation. And moreover, traditional experience trial and error are replaced by accurate calculation based on a physical model, and the relative error between the predicted concentration of the model and a measured value is reduced, so that accurate prediction and regulation of the concentration are realized, and the yield of the cover plate glass is remarkably improved.

A low-cost Q690D steel plate and its online quenching-tempering production method belong to the field of steel heat treatment technology. Its chemical composition and mass content are: C 0.14-0.17%, Si 0.25-0.35%, Mn 1.35-1.55%, P≤0.01%, S≤0.005%, Cr 0.30-0.50%, Nb 0.020-0.035%, Ti 0.015-0.025%, V 0.02-0.04%, B 0.0015-0.0025%, with the remainder being iron and unavoidable impurities. The production method includes controlled rolling, online quenching, and tempering processes. This invention does not add precious metal elements such as Ni, Mo, and Cu, resulting in low alloy cost, short process time, and a steel plate with a yield strength ≥690MPa and an impact energy ≥120J at -20℃, exhibiting good strength and toughness matching.

This application relates to a wire rod, an arc-sprayed wire, and a preparation method thereof, belonging to the technical field of arc-sprayed materials. The chemical composition of the wire rod, by mass fraction, is: C: 0.08%~0.14%, Si: 0.10%~0.60%, Mn: 1.50%~2.00%, P≤0.020%, S≤0.020%, Cr≤0.10%, Ni≤0.10%, Mo≤0.05%, Cu≤0.10%, Ti≤0.010%, Al≤0.020%, N≤0.010%, TO≤0.010%, with the remainder being Fe and unavoidable impurities. The wire is prepared by optimizing the chemical composition of the alloy wire rod through processes such as smelting, continuous casting, rolling, surface treatment, rough drawing, copper plating, and fine drawing. The mass fraction of Cu is 0.10%~0.25%, and the other elements are the same as those in the wire rod. This wire material has excellent wear and corrosion resistance and adhesion strength to the aluminum alloy substrate. It can form a stable protective coating on the inner wall of the engine cylinder, taking into account both the advantages of engine lightweighting and high performance requirements, and effectively supporting long-term service.

The invention discloses a bainite steel treatment process with superfine retained austenite, and belongs to the technical field of bainite steel heat treatment. The method comprises the following steps: (1) heating an as-cast billet, preserving heat, and completely converting the internal structure of the as-cast billet into austenite to obtain a billet; (2) carrying out water quenching on the steel billet obtained in the step (1) until the temperature is 3-5 DEG C below the Ms temperature; (3) carrying out isothermal treatment on the steel billet subjected to water quenching in the step (2), and after isothermal treatment, carrying out air cooling on the steel billet to room temperature; and (4) the steel billet cooled in the step (3) is subjected to tempering treatment, and the bainite steel with the superfine retained austenite is obtained. The bainite steel with good comprehensive performance is obtained through the simple and efficient treatment process, and the bainite steel can meet more application requirements.